I have 2 kitties that prefer to sleep on the quilt that is rolled on the long-arm frames. They leave dents! I know a cat will never sleep on aluminum foil but that was quite a large surface. I purchased a survival blanket (lightweight silver looking blanket) from the camping gear part of the store and lay it over the quilt-in-frame. I have another that I lay over my piled-high-with-fabric cutting table. Kitties stay away.